Java Integer Format formatIntegerWithLeadingZeros(long x, int radix, int length)

Description

format Integer With Leading Zeros

License

Open Source License

Declaration

public static String formatIntegerWithLeadingZeros(long x, int radix,
            int length) 

Method Source Code

//package com.java2s;
/*//from  ww  w . j  a  v  a 2 s  . c o  m
 Copyright (C) 2017, 2018 Bengt Martensson.

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 3 of the License, or (at
 your option) any later version.

 This program is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 this program. If not, see http://www.gnu.org/licenses/.
 */

public class Main {
    public static String formatIntegerWithLeadingZeros(long x, int radix,
            int length) {
        return radix == 2 ? formatIntegerBase2WithLeadingZeros(x, length)
                : radix == 8 ? formatIntegerBase8WithLeadingZeros(x, length)
                        : radix == 16 ? formatIntegerBase16WithLeadingZeros(
                                x, length)
                                : formatIntegerBaseSomeWithLeadingZeros(x,
                                        radix, length);
    }

    private static String formatIntegerBase2WithLeadingZeros(long x,
            int length) {
        return pad(Long.toBinaryString(x), length, 1);
    }

    private static String formatIntegerBase8WithLeadingZeros(long x,
            int length) {
        return pad(Long.toOctalString(x), length, 3);
    }

    private static String formatIntegerBase16WithLeadingZeros(long x,
            int length) {
        return pad(Long.toHexString(x), length, 4);
    }

    private static String formatIntegerBaseSomeWithLeadingZeros(long x,
            int radix, int length) {
        return pad(Long.toString(x, radix), length,
                Math.log(radix) / Math.log(2.0));
    }

    private static String pad(String rawString, int length, double noBits) {
        StringBuilder str = new StringBuilder(rawString);
        int effectiveLength = (int) Math.ceil(length / noBits);
        while (str.length() < effectiveLength)
            str.insert(0, '0');
        return str.toString();
    }
}

Related

1. formatInteger(int inInt, int inLen, boolean inComma, int inCommaPos)
2. formatInteger(int integer, int length)
3. formatInteger(int value, int length)
4. formatInteger(Integer value)
5. formatIntegerBase2WithLeadingZeros(long x, int length)
6. formatIntents(String[] intents)
7. formatInterval(long interval)
8. formatIntoHHMMSS(int secsIn)
9. formatIntoHHMMSS(long l)